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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2021/02/25 05:17:00 UTC

[jira] [Commented] (SPARK-34533) Eliminate LEFT ANTI join to empty relation in AQE

    [ https://issues.apache.org/jira/browse/SPARK-34533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17290675#comment-17290675 ] 

Apache Spark commented on SPARK-34533:
--------------------------------------

User 'c21' has created a pull request for this issue:
https://github.com/apache/spark/pull/31641

> Eliminate LEFT ANTI join to empty relation in AQE
> -------------------------------------------------
>
>                 Key: SPARK-34533
>                 URL: https://issues.apache.org/jira/browse/SPARK-34533
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.2.0
>            Reporter: Cheng Su
>            Priority: Minor
>
> I discovered from review discussion - [https://github.com/apache/spark/pull/31630#discussion_r581774000] , that we can eliminate LEFT ANTI join (with no join condition) to empty relation, if the right side is known to be non-empty. So with AQE, this is doable similar to [https://github.com/apache/spark/pull/29484] .



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